Mutating the `raw` variable like this would cause issues upstream, meaning that the modification is not persisted. Instead, we should allocate a new string like the other replacement methods.
If an image is oneboxed directly, then we should replace the onebox URL with a markdown image tag. This ensures that the wrapper link points to the downloaded version rather than the original.
This regressed in bf6f8299
Previously, with the default `editing_grace_period`, hotlinked images were pulled 5 minutes after a post is created. This delay was added to reduce the chance of automated edits clashing with user edits.
This commit refactors things so that we can pull hotlinked images immediately. URLs are immediately updated in the post's `cooked` HTML. The post's raw markdown is updated later, after the `editing_grace_period`.
This involves a number of behind-the-scenes changes including:
- Schedule Jobs::PullHotlinkedImages immediately after Jobs::ProcessPost. Move scheduling to after the `update_column` call to avoid race conditions
- Move raw changes into a separate job, which is delayed until after the ninja-edit window
- Move disable_if_low_on_disk_space logic into the `pull_hotlinked_images` job
- Move raw-parsing/replacing logic into `InlineUpload` so it can be easily be shared between `UpdateHotlinkedRaw` and `PullUserProfileHotlinkedImages`
Under some conditions, replacing an `<img` with `![]()` can break rendering, and make the image disappear.
Context at https://meta.discourse.org/t/152801
It previously failed to match URLs with characters other than `[a-zA-z0-9\.\/:-]`. This meant that `PullHotlinkedImages` would sometimes download an external image and then never use it in any posts.
Zeitwerk simplifies working with dependencies in dev and makes it easier reloading class chains.
We no longer need to use Rails "require_dependency" anywhere and instead can just use standard
Ruby patterns to require files.
This is a far reaching change and we expect some followups here.
* FIX: inline_uploads and subfolder
* if subfolder, also look for images with a path containing
cdn_url + relative_url_root
* FIX: migrate_to_s3 task and subfolder
